package com.nowcoder.community.controller;

import com.nowcoder.community.entity.*;
import com.nowcoder.community.event.EventConsumer;
import com.nowcoder.community.event.EventProducer;
import com.nowcoder.community.service.CommentService;
import com.nowcoder.community.service.DiscussPostService;
import com.nowcoder.community.service.LikeService;
import com.nowcoder.community.service.UserService;
import com.nowcoder.community.utils.CommunityConstant;
import com.nowcoder.community.utils.CommunityUtil;
import com.nowcoder.community.utils.HostHolder;
import com.nowcoder.community.utils.RedisKeyUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;

import java.util.*;

@Controller
@RequestMapping("/discuss")
public class DiscussPostController implements CommunityConstant {

    @Autowired
    private DiscussPostService discussPostService;

    @Autowired
    private HostHolder hostHolder;

    @Autowired
    private EventProducer eventProducer;
    @Autowired
    private RedisTemplate redisTemplate;

    @RequestMapping(path = "/add", method = RequestMethod.POST)
    @ResponseBody
    public String addDiscussPost(String title, String content) {
        User user = hostHolder.getUser();
        if (user == null) {
            return CommunityUtil.getJSONString(403, "你还没有登录哦!");
        }

        DiscussPost post = new DiscussPost();
        post.setUserId(user.getId());
        post.setTitle(title);
        post.setContent(content);
        post.setCreateTime(new Date());

        discussPostService.insertDiscussPost(post);

        // 触发发帖事件
        Event event = new Event()
                .setTopic(TOPIC_PUBLISH)
                .setUserId(user.getId())
                .setEntityType(ENTITY_TYPE_POST)
                .setEntityId(post.getId());
        eventProducer.fireEvent(event);

        // 计算帖子分数
        String redisKey = RedisKeyUtil.getPostScoreKey();
        redisTemplate.opsForSet().add(redisKey, post.getId());
        // 报错的情况,将来统一处理.
        return CommunityUtil.getJSONString(0, "发布成功!");
    }


    @Autowired
    private CommentService commentService;
    @Autowired
    private UserService userService;

    @Autowired
    private LikeService likeService;


    @RequestMapping("/detail/{id}")
    public String getDiscussPostById(@PathVariable("id") int id, Model model, Page page){
        DiscussPost post = discussPostService.getDiscussPostById(id);
        model.addAttribute("post",post);
        User user = userService.findUserById(post.getUserId());
        model.addAttribute("user",user);

        // 点赞数量
        long likeCount = likeService.findEntityLikeCount(ENTITY_TYPE_POST, id);
        model.addAttribute("likeCount", likeCount);
        // 点赞状态
        int likeStatus = hostHolder.getUser() == null ? 0 :
                likeService.findEntityLikeStatus(hostHolder.getUser().getId(), ENTITY_TYPE_POST, id);
        model.addAttribute("likeStatus", likeStatus);

        //评论分页信息
        page.setLimit(5);
        page.setPath("/discuss/detail/"+post.getId());
        page.setRows(post.getCommentCount());


        //评论 ：给帖子的评论
        //回复： 给评论的评论

        //评论列表
        List<Comment> commentList=commentService.findCommentsByEntity(ENTITY_TYPE_POST
        ,post.getId(),page.getOffset(),page.getLimit());



        //评论VO列表
        List<Map<String,Object>> commentVolist=new ArrayList<>();
        if(commentList!=null){
            for (Comment comment : commentList) {
                Map<String,Object> map=new HashMap<>();
                //评论
                map.put("comment",comment);
                //作者
                map.put("user",userService.findUserById(comment.getUserId()));

                // 点赞数量
                likeCount = likeService.findEntityLikeCount(ENTITY_TYPE_COMMENT, comment.getId());
                map.put("likeCount", likeCount);
                // 点赞状态
                likeStatus = hostHolder.getUser() == null ? 0 :
                        likeService.findEntityLikeStatus(hostHolder.getUser().getId(), ENTITY_TYPE_COMMENT, comment.getId());
                map.put("likeStatus", likeStatus);
                //回复列表
                List<Comment> replyList=commentService.findCommentsByEntity(ENTITY_TYPE_COMMENT,comment.getId(),0,Integer.MAX_VALUE);

                //回复VO列表
                List<Map<String,Object>> replyVolist=new ArrayList<>();
                if(replyList!=null){
                    for (Comment reply : replyList) {
                        Map<String,Object> replyVo=new HashMap<>();
                        //回复
                        replyVo.put("reply",reply);
                        //回复的作者
                        replyVo.put("user",userService.findUserById(reply.getUserId()));
                        //回复目标
                        User target = reply.getTargetId() == 0 ? null : userService.findUserById(reply.getTargetId());
                        replyVo.put("target",target);

                        // 点赞数量
                        likeCount = likeService.findEntityLikeCount(ENTITY_TYPE_COMMENT, reply.getId());
                        replyVo.put("likeCount", likeCount);
                        // 点赞状态
                        likeStatus = hostHolder.getUser() == null ? 0 :
                                likeService.findEntityLikeStatus(hostHolder.getUser().getId(), ENTITY_TYPE_COMMENT, reply.getId());
                        replyVo.put("likeStatus", likeStatus);
                        replyVolist.add(replyVo);

                    }
                }

                //给每个评论
                map.put("replys",replyVolist);

                //回复的数量
                int replyCount=commentService.findCommentCount(ENTITY_TYPE_COMMENT,comment.getId());
                map.put("replyCount",replyCount);
                commentVolist.add(map);

            }
        }
     model.addAttribute("commentVolist",commentVolist);
        return "site/discuss-detail";
    }


    // 置顶
    @RequestMapping(path = "/top", method = RequestMethod.POST)
    @ResponseBody
    public String setTop(int id) {
        discussPostService.updateType(id, 1);

        // 触发发帖事件
        Event event = new Event()
                .setTopic(TOPIC_PUBLISH)
                .setUserId(hostHolder.getUser().getId())
                .setEntityType(ENTITY_TYPE_POST)
                .setEntityId(id);
        eventProducer.fireEvent(event);

        return CommunityUtil.getJSONString(0);
    }

    // 加精
    @RequestMapping(path = "/wonderful", method = RequestMethod.POST)
    @ResponseBody
    public String setWonderful(int id) {
        discussPostService.updateStatus(id, 1);

        // 触发发帖事件
        Event event = new Event()
                .setTopic(TOPIC_PUBLISH)
                .setUserId(hostHolder.getUser().getId())
                .setEntityType(ENTITY_TYPE_POST)
                .setEntityId(id);
        eventProducer.fireEvent(event);
        // 计算帖子分数
        String redisKey = RedisKeyUtil.getPostScoreKey();
        redisTemplate.opsForSet().add(redisKey, id);
        return CommunityUtil.getJSONString(0);
    }

    // 删除
    @RequestMapping(path = "/delete", method = RequestMethod.POST)
    @ResponseBody
    public String setDelete(int id) {
        discussPostService.updateStatus(id, 2);

        // 触发删帖事件
        Event event = new Event()
                .setTopic(TOPIC_DELETE)
                .setUserId(hostHolder.getUser().getId())
                .setEntityType(ENTITY_TYPE_POST)
                .setEntityId(id);
        eventProducer.fireEvent(event);

        return CommunityUtil.getJSONString(0);
    }

}
